kristien4:
Is a 3480watts total pv array producing 2700w maximum wattage a good one?

kristien4:
There is no voltage increase.Pv voltage is 45v on the screen. Its a 51v panel. So i guess length of wire/sun intensity has reduced it. But then again why the 33amps charging current and 12amps pv amps disparity.

JoeSef0:
Pwm. According to the controller configuration. The max wattage for 12v panels is 780, while 180w x5 will give 900w if I'm to connect 24v i can use upto 1500w of panels

JoeSef0:
The system is a 12v (inverter and battery) charge controller is an automatic (12-48v) 60a

OilandGasMarket:

Location

yehmy:
Anybody with mtn mifi for sale, I don't need your sim just the mifi and make sure the battery is very strong.

Yorubahdguy:
Hello my people

I need help again. Remember months back, I had a 6 units of battery, 10kva 48volts inverter and 14 panels installed for me. Though, only 4 batteries are running at the moment and the other two are just connected to charge.

Recently, I noticed a drop. The backup doesn’t last at all. This system usually takes me 24 hours and repeat if there’s no light. But now, once the sun goes down, it doesn’t serve past 6 hours sef that’s even if I’m running just a rechargeable fan and a light bulb. Then, this system would take me till dawn even with my fridge on and I won’t use past 40% of the total charge overnight.

Initially, I thought it was the charge controller so I had one of my boss swap his charge controller with mine, but no changes. Then I realized that when I charge with NEPA, it works very fine. But when I charge with solar, it doesn’t last at all. Meanwhile… I have 14 whole panels.

One of my boss said that dusts has covered the panels due to the harmattan that we need to clean the panels panels which we did.

In summary, system lasts and works very fine when charged with NEPA, but doesn’t last at all when I charge with solar panel.

What could be the issue? I’ve been substituting with fuel because our light is not always constant.

Please, help a brother.

dacool1:


12.0v is 20% Dod for li-ion 3s configuration. Lfp is fully charge at 13.6v(when the charger is disconnected), 14.4v is the voltage when the battery is still being CHARGED, same thing applies to Lead acid batteries (flooded) charged at 14.2v to 14.6v depending on temperature and while at rest, it's fully charged at 12.7v.
On a final note, depending on your source of information and brand of LFP I'll stick with 12.8v for 80% DOD (to avoid over discharging)

dacool1:


Yes, lfp handles load better than lithium ion because lfp has a more stable voltage during its discharge. Lithium ion can also be discharged to 80% but voltage will be much lower and this affects inverters performance.

For comparison, LFP fully charged at13.6v and 12.9v at 80% Dod while lithium ion 12.6v at fully charged and 12.0v at about 20% DOD. Note the voltage difference.


Most times, inverters will hit LVD on some load while using lithium ion despite having a lot of juice but it rarely happens when you make use of LFP (especially when your battery bank is not large).

Though you can correct this by changing the configuration of the lithium ion by changing from 3s to 4s but this usually cause a problem with getting the voltage to work with your inverter especially 12v systems.

dacool1:

Transformer based

dollarnaira:
Pls who is currently using a pwm cc for any lithium? I need the brand name of one urgently. Pls share!

officialfestus:
Happy new year dollarnaira, valto, peneseun and others.
I pray this year treats you better.

officialfestus:
It seems this board is faulty after idling for years without use, because the UPS tries to power on but it immediately cut off power.

can I make use of the transformer without the board?


valto dollarnaira

Drgreatone:

Back of tv 19.5v 109w
Adaptor output 19.5v 6.2a

oloet:


Dey play 😂
Penuelseun please come!!!

ksmart027:

Good morning boss, how is these your pack doing, is it still working? Thanks.

Machiny:
Thanks man I really appreciate. But what of in a case tying the adapter wire red to red and black to black of the battery is that workable? Instead of going through the fan.

Machiny:
the solar port is stating 12v to 15v. pix 1 is the port,2 the 12v adaptor, 3 the replacement battery. Through the solar port this adaptor powers it, but the battery didn't get full although the night so I assumed its not charging the battery. what I seek now is if I can connect the adaptor directly to the battery not through the solar port.

Machiny:
thanks for your assistance so far. But just noticed the both adaptors I have are 12v 1.5a and 19v 3.3a, none of them can go? Am just trying to be economical because I just changed the board of the fan and don't intend spending on the fan nw except its necessary. Thanks

Machiny:
so you are saying those laptop chargers on 15v 2.5a wld work? Connecting to the battery directly? Because its a 12v 9ah battery.

Machiny:
Got a replacement battery for my fan but just noticed the power source is bad. I have a 12v 1.5a adaptor can it substitute a charger?

ojehmario1969:

wetin happen na boss.
I dey serious about this stuffs
I stay in oleh, from the thread I learnt that you live in warri. So e go dey easy for me to call or chat u up so that if na for me to come warri come buy them cause na you go know better ones. From oleh to warri no go pass 2k transport. We can actually chat here if that’s what you want

officialfestus:
Soldering stage is next, I'll be getting the wires soon.
@penuelseun @dollarnaira

officialfestus:
ok thanks for the feedback.
I'll be building one soon.

officialfestus:
greetings sir, how's the performance of this lithium battery so far?

Edrizz:
Definitely there's going to be difference in charging going by these mathematical calculations.

12v 100ah
12.8v x 100ah = 1,280wh/1.28kwh

2 x 415watt panels = 830watt

So, 1,280wh ÷ 830watt = 1.542h. So approximately within 2 - 3hours of a great sunlight n provided the inverter system is idle, the battery should be fully charged

24v 100ah
12.8v × 2 × 100ah = 2,560wh/2.56kwh

2 x 415watt panels = 830watt

So, 2,560wh/830watt = 3.08h. By this calculation, the 24volts pack should attain full charge within 3 - 4hours provided all other factors is considered.

In conclusion, 12volt 100ah battery is not the same as 24volt 100ah battery. When in use under the same condition, 24volt 100ah battery would last longer than 12volt 100ah battery

dollarnaira:


Me still dey inside 18650 oo plus LifePO4.
If you have ur way with lithium ion u go fear.
You sold out urs back den probably u didn't do proper balance to max it out.

brightk:


This one u de throw shades from sides abt coupled lithium bstteries . Come out n talk 2 us directly lol.

Oronto:
Can a smart dstv lnb work with a free to air decoder? Because I tried installing nicomsat with 12518 h 29500 and nailed it. But when scanning it was joy tv that came out. Is the lnb the problem? Or the decoder?

Drgreatone:
I av come again gurus, I have a 12v 1kva hybrid afripower inverter(spec is pwm wit max volt,current and panel as 25v,25a and 600w resp) which i mainly use to power lights and TV. Was working towards adding 600w solar panel wit seperate CC just so I can add my freezer to it. Today I decided to just plug the freezer to the inverter today to even see if it would carry it and voila inverter tripped off showing shortcircuit and then later overload. This inverter usually carries it if utility is available but this one it failed wit just the dc, what do I do? Would connecting the panels directly to the inverter help instead of using CC or do i av to get a bigger inverter? Freezer is haier thermocool 200l wit input current at 180watts

ewerex:


Thanks a lot for today.
I really appreciate it bro.

oweniwe:


1 hp AC, 250-500L Freezer, Bed side fridge, 4 fans, TV, Decoder, Lights... That's all

8am - 8pm daily

But due to situation on ground, no AC and Deep freezer usage until I get another 220ah battery